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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. 26 hours after estrus begins






2. Larger the cow - more milk is produced; smaller the cow - less milk is produced






3. Larger the cow - more milk is produced; smaller the cow - less milk is produced






4. Castration tool which clamps down on the vans deferens. causes the sperm to not reach the penis to be ejaculated






5. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg






6. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase






7. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has






8. 45-60 days after breeding; re-breed as required






9. Days which have increasing daylight hours

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10. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.

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11. What helps regulate spermatogenesis?






12. 30-38 hours after estrus cycle begins






13. Parturition is controlled by...






14. When she is pregnant in her last trimester because she needs the energy to carry around and deliver the calf. and when the calf is born because the cow needs the fat to be deposit it into her milk for the calf's energy stores.






15. The more stressed out the male is - the less sperm he is going to produce






16. Contains and regulates the temp of the testes for sperm production






17. 1. brain function - 2. blood flow - 3. willing female






18. Important 'landmark' during palpation






19. Sperm is produced here






20. Microscopic - make sure not sterile - very few bulls are actually tested






21. (LH) stimulates the Leydig cells to produce testosterone






22. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co






23. (LH) stimulates the Leydig cells to produce testosterone






24. (male) pushes the testes outward toward the legs for a cool-down off of the body






25. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders






26. What helps regulate spermatogenesis?






27. 1. bring in new genes - 2. replace males with leg problems (difficulty breeding) Note: culling has a much greater emphasis in the dairy industry vs the beef industry.






28. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells






29. Milk ~305 days - dry 60 days prior to calving






30. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)






31. 336 days






32. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase






33. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm






34. 1-3 days






35. Help to signal hormone levels which we need both in the brain right next to each other.






36. When are steers and heifers weaned from bottle feeding?






37. 24 hours before end of estrus cycle






38. Can survive ~7 days in cow. vast majority <48 hours






39. 19-23 (21) days






40. Animals which have only one estrous cycle (ex: dog - fox)






41. 1. bring in new genes - 2. replace males with leg problems (difficulty breeding) Note: culling has a much greater emphasis in the dairy industry vs the beef industry.






42. Male on one pin and female on other side






43. ~305 days (altough often longer due to breeding difficulties)






44. Help to signal hormone levels which we need both in the brain right next to each other.






45. Scar tissue plugs up chambers of udder






46. 4-6 days






47. 1-2 days






48. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed






49. Located directly in front of the cervix. fertilized egg implants here. connected to two uterine horns. implantation occurs on the same side as ovulation occurred.






50. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders